The company said it would be able to borrow up to $20.9 billion under the new program, raising its maximum available credit from the Fed to $144 billion under three different programs. The credit includes an earlier emergency loan of $85 billion from the Fed that carries a much higher interest rate.

A.I.G.’s big borrowings underscore the company’s bewilderingly rapid decline. When it suddenly faced a cash crisis in mid-September, the original estimate of the amount it needed was just $20 billion. A few days later, the Fed stepped forward with its $85 billion credit line. And now, the stunning size of that original bailout has grown by almost 70 percent.

A.I.G.’s cash needs could grow even further. Much of the cash it needs is being used to meet collateral calls from its derivatives counterparties, and the precise collateral triggers and amounts are not public information. In general, the derivative contracts cost A.I.G. more as the real estate markets decline. The company’s financial products division did a lot of business in that type of derivative, called credit-default swaps.

By the same token, if real estate prices rebounded, A.I.G. has said, it could call some of the collateral back.

In addition to the $85 billion credit line and the $20.9 billion commercial paper program, A.I.G. has a $38 billion facility from the Fed that provides liquidity for the company’s securities-lending business. A.I.G. said on Thursday that it was currently using about $18 billion of this facility.

By tapping the newest source of money from the Fed, A.I.G. was able to reduce the amount it had borrowed under the original $85 billion line of credit, said a spokesman, Joe Norton. He said the company had currently drawn down $65.5 billion from that loan, compared with about $72 billion a week ago.

The Fed extended the original $85 billion line of credit at a steep price. On the part of the loan that A.I.G. draws down, it must pay an interest rate of 8.5 percentage points over the three-month Libor, an index rate for inter-bank lending. On the unused portion, A.I.G. must pay a fixed rate of 8.5 percent. In addition, the Fed added a 2 percent commitment fee to the total balance when it started the loan.

Mr. Norton said A.I.G. had incurred interest and fees of about $331 million so far. The Fed also took a majority stake in A.I.G. in exchange for the bailout, angering shareholders, who were almost completely wiped out.

I am trying to think of an analytical comment for this story, but all I can think of is that the U.S. government has just purchased a bank. AIG made some very bad bets in the derivatives market, and now the company doesn't have the money to pay off these contracts. The AIG shareholders have been completely wiped out. AIG probably doesn't have the assets to pay off the liabilities, and so enters the U.S. Treasury. The American taxpayer has purchased American International Group for the price of $144 billion. I wonder how many other Wall Street investment banks that the American taxpayer will be purchasing in the future?